I was thinking that if there was a way for me to modify the installed library to disable that pin, then maybe I can use that pin for my OLED display. However, I am not too sure what loss of functions the phat beat might incur as a result. If there is still audio output, then I am ok to accept those changes that comes with disabling BCM24 for phat beat.

According to the pinout, that is the Clock. I think you’ll find that signal is rather important and the pHat Beat likely won’t work without it. @gadgetoid would likely know for sure, what it does and if its needed. That’s above my skill level. ;)